Originally Posted by

**pabo**
Sorry - go to any elementary math class with 10 + 8% and you will be turned away without an answer. The statement follows none of the standard MATHEMATICAL conventions, despite the fact a calculator may give you an answer.

It's the same ambiguity that results when you use the rule "5 or more round up". I like to play this game with elementary age kids - 1.5 rounds to 2, but so does 1.445. Clearly, 1.445 is NOT closer to 2 than to 1. You cannot call something a rule just because a lot of people do it. If you use imprecise language, you are bound to get different results from different "interpreters" - in this case the calculator. Personally, if you did the calculation conversationally what is ten plus eight.... percent, the value 0.18 is as good an answer as any.

Some people just need to describe every "issue" as a "problem"....